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Harmon Kardon unlock error

I have a Harmon Kardon surround stereo system, which is connected to a panasonic projector through a helios DVD player. I cant hear any sound cause some stupid error message keeps saying "Unlock" after i select a surround sound mode. HELP ME!!! =)

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  • panther3347 Dec 04, 2008

    I have the same problem. MY Harmon Kardon AVR 645 just seems to have quit all of a sudden neither my cable tv or my dvd player works. The receiver keeps flashing UNLOCK. I tried a different HDMI cable incase I had a bad cable but no luck. Please help.

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I have the same problem. All of a sudden no sound through my TV connection (but through the DVD connection the sound was still working). I changed the connection from video 1 to video 2 and got the sound back. It is not a real solution, but a practical one :-)

Posted on Feb 01, 2009

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Posted on Jan 02, 2017

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You can connect your Sony DVD player to your Panasonic HT using an analog RCA audio cable (white and red) for stereo sound. Connect to the AUX inputs on the HT and select AUX. Since the Sony DVD player only has SCART, you would need an adapter, scart to RCA. Like this one:
http://www.maplin.co.uk/scart-to-3-phono-plugs-with-in-out-switch-28102

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Do you know if the harman/kardon avr125 reciever is 3d capable?thanks ..mrmitchfinance@yahoo.com


Hi,
Actually Home theater sound, is 3D. (Three Dimentional) Your receiver, using surround speakers reproduces 3D sound.
i.e. It is Left to Right, and Front to Rear. Thus it's 3D. If your get a 3D TV, your sound will be just fine because it doesn't come from the set. The sound SOURCE is the DVD player, CD player or Cable Box. If you use digital audio outputs (optical cable or orange colored RCA cables) from these items connected into the Harmon-Kardon, your will get the full Home Theater sound. The Harmon Kardon does not have HDMI inputs however it will not need them for the purposes of sound. Your Receiver is a high quality unit. If you want the thrill of 3D TV, go ahead and get one. After you have set it up, if you then decide you want to go to 7.1 or some other SOUND upgrade, go ahead. One thing you should know, is that there is not a whole lot of audio quality improvement available after 5.1. Unless you have a very large living room. The real quality counts when choosing the speakers and sub woofer that go into the system, not the amount of speakers you have.
I have done a number of high end home theater installations and the experience of hearing the systems (mostly 5.1) has been a thrill for the owner.
I hope this helps you,
Best Regards,
Mark

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Harmon kardon 745 displays "unlock" no sound for tv or movies


I also had this UNLOCK message on my Harman Cardon AVR 130.
The reason for this error was - in a hurry I've plugged the optical input into optical OUT! Double check that your connections in the back are correct and hopefully it fixes your problem.

Cheers,
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